Graphics · critical

How to fixNVIDIA-NVLDDMKM-CRITICAL

NVIDIA kernel driver critical error (nvlddmkm)

What this error means

NVIDIA-NVLDDMKM-CRITICAL is a critical-severity graphics card (GPU) problem. A critical failure in the NVIDIA kernel-mode display driver (nvlddmkm.sys). This is more severe than a standard TDR event — the driver cannot recover and triggers a system BSOD. This commonly occurs with corrupt driver installations, hardware memory errors in VRAM, or PCIe power delivery issues. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01DDU clean driver removal in Safe Mode
  1. DDU clean driver removal in Safe Mode
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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02Reseat PCIe power connectors
  1. Reseat PCIe power connectors
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

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03Run OCCT VRAM stress test
  1. Run OCCT VRAM stress test
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • Corrupt NVIDIA driver installation
  • VRAM hardware fault
  • Inadequate PCIe power connector